1. Planets

    Scientists Say: Exomoon

    A moon that orbits a planet in our solar system in a moon. But a moon that orbits a planet outside our solar system? That’s an exomoon.

  2. Space

    Quake-scouting lander safely touches down on Mars

    NASA’s InSight lander has just arrived safely on the Martian surface. Its two year mission is to record any ‘Marsquakes’ and other signs of the planet’s geologic activity.

  3. Tech

    Prepping for drone exploration of Mars

    Twelve-year-old James Fagan, a budding engineer from Riverside, Calif., has built a wind tunnel. He uses it to test scale models of drones and other vehicles under Mars-like conditions.

  4. Space

    Hubble may have spotted a possible ‘exomoon’

    The apparent moon would be the size of Neptune and orbit a distant gas-giant planet known as Kepler 1625b.

  5. Planets

    Jupiter has 12 more moons than we knew about — and one is a weirdo

    Astronomers found a dozen previously unknown moons of Jupiter. One may be a remnant of a larger moon that was all but ground to dust.

  6. Planets

    New Horizons data reveal first global maps of Pluto and Charon

    Astronomers have made new charts of Pluto and its moon Charon. They show high peaks, deep depressions and strange ridges.

  7. Planets

    Finding living Martians just got a bit more believable

    What might a real Martian look like? Scientists have a better idea after identifying a buried liquid lake on the Red Planet.

  8. Planets

    Mars appears to have a lake of liquid water

    A 15-year-old Mars orbiter has spotted signs of a salty lake beneath the Red Planet’s southern polar ice sheets.

  9. Planets

    Thick atmosphere boosts how fast Venus spins

    The thick atmosphere on Venus can change by a few minutes every day how long it takes the planet to rotate.

  10. Planets

    Pluto’s heart has dunes of methane ice

    Pluto’s heart-shaped plains are striped with sand dunes. The sand is made of methane ice.

  11. Chemistry

    Diamonds and more suggest unusual origins for asteroids

    Inside a meteorite, scientists found sulfur and iron wrapped in tiny diamonds. Those gems hint the rock formed inside a long-lost planet.

  12. Planets

    Uranus has stinky clouds

    Hydrogen sulfide makes Uranus reek of rotten eggs.